20422221439 has 2 divisors, whose sum is σ = 20422221440. Its totient is φ = 20422221438.

The previous prime is 20422221377. The next prime is 20422221511. The reversal of 20422221439 is 93412222402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20422221439 - 2¹³ = 20422213247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20422221439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20422221739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211110719 + 10211110720.

It is an arithmetic number, because the mean of its divisors is an integer number (10211110720).

Almost surely, 2^20422221439 is an apocalyptic number.

20422221439 is a deficient number, since it is larger than the sum of its proper divisors (1).

20422221439 is an equidigital number, since it uses as much as digits as its factorization.

20422221439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 31.

The spelling of 20422221439 in words is "twenty billion, four hundred twenty-two million, two hundred twenty-one thousand, four hundred thirty-nine".